JP2007184962A - Video signal recording and reproducing apparatus and video signal reproducing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To generate a search image with which a summary of recorded contents can be obtained and a video signal can be searched when video signals are recorded on a recording medium. <P>SOLUTION: A video signal recording apparatus 1 records an input video signal on a recording medium 15. At such a time, an additional information detection circuit 16 detects additional information included in a sub code of the input video signal or in a vertical blanking interval. A feature quantity detection circuit 17 detects a feature quantity indicating an amount of motion of the video signal or presence of telop. On the basis of the additional information and feature quantity, a system controller 20 detects an image to be displayed as a search picture. When detecting such an image, the system controller 20 supplies an identification signal indicative of the detected image to a recording processing circuit 14 and the recording processing circuit 14 records the identification signal in a sub code or the like, for example. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a video signal recording apparatus and a video signal reproducing method for recording and reproducing a search screen for grasping an outline of the content of the video signal and searching for the video signal together with the video signal.

  In recent years, recording media such as optical disks, hard disks, and digital video tapes for recording video signals broadcasted by television broadcasting and digital satellite broadcasting have a storage capacity of several megas to several tens of gigabytes, and the capacity has been increased. Is progressing. Therefore, on such a large-capacity recording medium, video signals can be continuously recorded for a long time of several hours to several tens of hours.

JP-A-8-317331 JP-A-2-81385 JP-A-8-102922 JP-A-6-149902 JP-A-8-317342 JP-A-6-105280 Japanese Patent Laid-Open No. 9-6810

  By the way, when video signals such as television broadcasts are recorded using such a recording medium, since the recording capacity is large, even if high-speed playback is performed after recording, it is not possible to confirm all the contents in a short time. . Therefore, when recording a television broadcast or the like using such a large-capacity recording medium, it is necessary to have a function for confirming the outline of the recorded contents and the recording position information of each program.

  However, it has been very difficult to confirm an outline of the contents of a video signal recorded on a conventional recording medium. For example, in order to confirm the outline of the content recorded on the recording medium, interval playback in which playback points are skipped at regular intervals can be considered, but in this interval playback, there is no relation to the information content of the recorded video signal. Will play. Therefore, it is difficult to grasp the content of the video signal in this interval reproduction.

  An object of the present invention is made in view of such circumstances, and together with a video signal, an outline of the content of the video signal is grasped, and a search screen for searching the video signal is recorded and reproduced. An object of the present invention is to provide a video signal recording / reproducing apparatus and a video signal reproducing method.

  The video signal recording / reproducing apparatus according to the present invention is based on the additional information detecting means for detecting the additional information of the video signal, the feature quantity detecting means for detecting the feature quantity of the video signal, the additional information and the feature quantity. An identification signal generating means for generating an identification signal corresponding to each screen of the video signal, a first identification signal based on the additional information generated by the identification signal generating means, and based on the feature amount Reproducing means for reproducing the video signal of the screen corresponding to the second identification signal.

  The video signal reproduction method according to the present invention includes a video signal and a recording medium on which an identification signal corresponding to each screen generated based on the additional information and feature amount of the video signal is recorded. A video signal of a screen corresponding to the first identification signal based on the second identification signal based on the feature amount is reproduced.

  The video signal recording / reproducing apparatus according to the present invention includes an additional information detecting unit that detects additional information of a video signal, a feature amount detecting unit that detects a feature amount of the video signal, and the additional information and the feature amount. Based on the identification signal generating means for generating an identification signal corresponding to each screen of the video signal based on the above, a database in which a plurality of combination patterns of the identification signals are registered, and the video signal of the screen corresponding to the identification signal are reproduced. Reproduction means, and a screen corresponding to the combination pattern of the identification signals is displayed as a search screen.

  Furthermore, the video signal recording / reproducing apparatus according to the present invention includes an additional information detecting unit that detects additional information of the video signal, a feature amount detecting unit that detects a feature amount of the video signal, and the additional information and the feature amount. Based on the identification signal generating means for generating an identification signal corresponding to each screen of the video signal, a recording medium on which the identification signal is recorded together with the video signal, and reproducing the video signal of the screen corresponding to the identification signal A plurality of identification signal combination patterns are registered in the recording medium, and a screen corresponding to the identification signal combination pattern is displayed as a search screen.

  According to the present invention, the first identification signal based on the additional information is recorded from the recording medium on which the identification signal corresponding to each screen generated based on the additional information and the feature amount of the video signal is recorded together with the video signal. And reproducing the video signal of the screen corresponding to the second identification signal based on the feature amount, the outline of the content of the video signal can be easily grasped, and the video can be efficiently You can search for signals.

  Hereinafter, a video signal recording apparatus according to an embodiment to which the present invention is applied will be described with reference to the drawings. The video signal recording apparatus according to this embodiment is an apparatus that records a video signal on a recording medium and generates an identification signal to be added to each screen based on the additional information and feature amount of the video signal.

  FIG. 1 is a block diagram of a video signal recording apparatus 1 according to an embodiment of the present invention.

  The video signal recording apparatus 1 is broadcasted with a video signal input processing circuit 2 to which an analog video signal broadcast or transmitted by wire is input and a camera signal input processing circuit 3 to which a transmission signal from a camera is input. Digital video signal input processing circuit 4 to which the transmitted digital video signal is input, reception signal input processing circuit 5 to which the wirelessly broadcast video signal and audio signal are input, video signal input processing circuit 2, camera signal Video signal switching circuit 6 for switching the video signal input by the input processing circuit 3, digital video signal input processing circuit 4, and reception signal input processing circuit 5, and a video signal compression circuit for compressing the input video signal 7.

  The video signal recording apparatus 1 includes an audio signal input processing circuit 8 to which an analog audio signal broadcast or transmitted by wire is input, a microphone signal input processing circuit 9 to which a transmission signal from a microphone is input, and a broadcast Digital audio signal input processing circuit 10 to which a digital audio signal transmitted or transmitted is input, audio signal input processing circuit 8, microphone signal input processing circuit 9, digital audio signal input processing circuit 10, and reception signal input processing circuit 5, an audio signal switching circuit 11 for switching the audio signal input processed by the audio signal 5, an audio signal detection processing circuit 12 for detecting the audio signal, and an audio signal compression circuit 13 for compressing the input audio signal. ing.

  In addition, the video signal recording apparatus 1 includes a recording processing circuit 14 that synthesizes the video signal compressed by the video signal compression circuit 7 and the audio signal compressed by the audio signal compression circuit 13 and records them on the recording medium 15. Yes.

  Also, additional information detecting circuit 16 for detecting additional information of a video signal to be broadcasted or transmitted, or additional information superimposed or added to each video signal, and a feature for detecting feature quantities of the video signal and the audio signal. And a quantity detection circuit 17.

  The video signal recording apparatus 1 generates an identification signal based on the additional information and the feature amount, and also includes a system controller 20 that controls each circuit, and a database 21 that stores data referred to by the system controller 20. And an operation input processing circuit 22 for supplying operation input information to the system controller 20.

  For example, an analog video signal broadcast by wire or a transmitted analog video signal is input to the video signal input processing circuit 2. The video signal input processing circuit 2 demodulates and converts the analog video signal into a baseband video signal, converts the baseband video signal into a digital video signal, and supplies the digital video signal to the video signal switching circuit 6. .

  For example, a video signal photographed by a video camera is input to the camera signal input processing circuit 3. If the video signal from the video camera is an analog signal, the camera signal input processing circuit 3 demodulates and converts it into a baseband video signal, and converts this baseband video signal into a digital video signal. This is supplied to the video signal switching circuit 6. Further, if the video signal from the video camera is a digital signal, the camera signal input processing circuit 3 performs error correction, decoding processing for decompressing the compressed signal, and the like, and supplies it to the video signal switching circuit 6.

  For example, a digitally transmitted video signal or a digitally broadcast video signal is input to the digital video signal input processing circuit 4. The digital video signal input processing circuit 4 performs processing such as demodulation of the input video signal, converts it into baseband digital data, performs error correction, decompression processing of the compressed signal, etc., and switches the video signal Supply to circuit 6.

  The received signal input processing circuit 5 is input with a video signal and an audio signal which are wirelessly broadcast and received by an antenna or the like. The received signal input processing circuit 5 performs processing such as demodulation of the received video signal, converts it into a baseband video signal, converts this baseband video signal into a digital video signal, and converts the video signal into a video signal switching circuit 6. To supply. Further, if the video signal is a digital signal, decoding processing such as error correction and decompression processing of compressed data is performed, and the video signal is supplied to the video signal switching circuit 6. The received signal input processing circuit 5 performs processing such as demodulation of the received audio signal, converts it into a baseband audio signal, converts this baseband audio signal into a digital audio signal, and switches the audio signal. Supply to the circuit 11. Further, if the audio signal is a digital signal, decoding processing such as error correction and decompression processing of the compressed data is performed and supplied to the audio signal switching circuit 11.

  Digital video signals from the video signal input processing circuit 2, the camera signal input processing circuit 3, the digital video signal input processing circuit 4, and the reception signal input processing circuit 5 are input to the video signal switching circuit 6. At this time, the input video signal is, for example, a digital video signal of a color difference signal. The video signal switching circuit 6 selects any one of the input video signals based on the control of the system controller 20, and the video signal compression circuit 7, the additional information detection circuit 16, and the feature amount detection circuit 17. To supply.

  A digital video signal from the video signal switching circuit 6 is input to the video signal compression circuit 7. The video signal compression circuit 7 compresses the digital video signal from the video signal switching circuit 6 by, for example, the MPEG2 (Moving Picture Experts Group 2) method and supplies the compressed video signal to the recording processing circuit 14.

  The audio signal input processing circuit 8 receives, for example, an analog audio signal broadcast by wire or a transmitted analog audio signal. The audio signal input processing circuit 8 demodulates the analog audio signal and converts it into a baseband audio signal, converts the baseband audio signal into a digital audio signal, and supplies the digital audio signal to the audio signal switching circuit 11. .

  For example, an audio signal detected by a microphone is input to the microphone signal input processing circuit 9. If the audio signal from the microphone is an analog signal, the microphone signal input processing circuit 9 demodulates and converts it into a baseband audio signal, converts the baseband audio signal into a digital audio signal, and converts the audio signal into a digital audio signal. The signal is supplied to the signal switching circuit 11. If the audio signal from the microphone is a digital signal, the error signal is corrected and the compressed signal is decompressed, and the decoded signal is supplied to the audio signal switching circuit 11.

  For example, a digitally transmitted audio signal or a digitally broadcast audio signal is input to the digital audio signal input processing circuit 10. The digital audio signal input processing circuit 10 performs processing such as demodulation of the input audio signal, converts it to baseband digital data, performs error correction, decompression processing of the compressed signal, etc., and switches the audio signal Supply to the circuit 11.

  Digital audio signals from the audio signal input processing circuit 8, the microphone signal input processing circuit 9, the digital audio signal input processing circuit 10, and the reception signal input processing circuit 5 are input to the audio signal switching circuit 11. The audio signal switching circuit 11 selects one of the input audio signals based on the control of the system controller 20 and supplies the selected audio signal to the audio signal detection processing circuit 12 and the feature quantity detection circuit 17.

  A digital audio signal from the audio signal switching circuit 11 is input to the audio signal detection processing circuit 12. The audio signal detection processing circuit 12 supplies the audio signal compression circuit 13 based on the control of the system controller 20.

  A digital audio signal from the audio signal detection processing circuit 12 is input to the audio signal compression circuit 13. The audio signal compression circuit 13 compresses the digital audio signal from the audio signal switching circuit 11 using, for example, the MPEG2 system and supplies it to the recording processing circuit 14.

  A digital video signal from the video signal compression circuit 7 and a digital audio signal from the audio signal compression circuit 13 are input to the recording processing circuit 14. The recording processing circuit 14 synthesizes the digital video signal and the digital audio signal in a predetermined format, that is, in a form corresponding to the recording format of the recording medium 15. Also, the file management information is generated in accordance with a recording medium for recording file management information called FAT (File Allocation Table), TOC (Table Of Contents), subcode, etc., and is synthesized with the digital video signal and the digital audio signal. These file management information and the like may be generated by the system controller 20 and recorded by the recording processing circuit 14 by combining with the video signal. Then, the recording processing circuit 14 modulates the video signals to be recorded by a predetermined method, and performs error correction code addition processing and the like to record on the recording medium 15.

  The recording medium 15 may be any recording medium such as a hard disk, a magnetic disk, a magneto-optical disk, and a memory card.

  The additional information detection circuit 16 receives the digital video signal from the video signal switching circuit 6. Further, the additional information detection circuit 16 is supplied with additional information supplied together with each input video signal of the reception signal from the antenna, the analog video signal, the camera signal, or the digital video signal. The additional information detection circuit 16 detects information other than the image data of the digital video signal, such as information inserted in the vertical blanking period, pilot information, or additional information included in the header portion of the digital video signal, etc. . Further, the additional information detection circuit 16 detects additional information supplied together with each input video signal. The details of this additional information will be described later.

  A digital video signal from the video signal switching circuit 6 and a digital audio signal from the audio signal switching circuit 11 are input to the feature amount detection circuit 17. The feature amount detection circuit 17 detects a motion amount, telop, audio information, and the like from the video signal and the audio signal, and outputs the detected motion amount, telop, audio information, etc. as a feature amount. The feature quantity detection circuit 17 supplies the detected feature quantity to the system controller 20. Details of this feature amount will be described later.

  The system controller 20 is supplied with additional information from the additional information detection circuit 16 and feature quantities from the feature quantity detection circuit 17. The system controller 20 generates an identification signal to be supplied to the recording processing circuit 14 based on the input additional information and feature amount. Details of the processing of the system controller 20 will be described later. The recording processing circuit 14 adds the identification signal supplied from the system controller 20 to the video signal and records it on the recording medium 15.

  Further, the system controller 20 performs switching control processing of the video signal switching circuit 6 and the audio signal switching circuit 11. That is, the system controller 20 determines the type of the input video signal and audio signal, and performs this switching control process. Further, the system controller 20 controls the audio signal detection processing circuit 12.

  The system controller 20 is supplied with control information and the like from the database 21. The system controller 20 performs various controls based on this control information.

  Further, the operation input information from the operation input processing circuit 22 is supplied to the system controller 20. The system controller 20 performs various controls based on this operation input information.

  Next, processing contents of the system controller 20 and additional information and feature amounts detected by the additional information detection circuit 16 and the feature amount detection circuit 17 will be described.

  As described above, the additional information detection circuit 16 detects pilot information included in the vertical blanking period of the video signal, additional information included in the header portion of the digital signal, and the like. Specific contents of additional information detected by the additional information detection circuit 16 include telop appearance information, music start information, music end information, person appearance information, program content information, program genre information, and broadcast time information.

  The telop appearance information is information indicating whether or not a telop such as subtitles included in the video signal appears on the screen. The music start information and the music end information are information indicating the start time and end time of the audio signal included together with the video signal. The person appearance information is information indicating that a person appears on the screen. This person appearance information indicates that, for example, a person named a sports player A appears. The program content information is information indicating a specific program name or the like of a broadcast video signal. Program genre information is information indicating the genre of a program of a broadcast video signal. The program genre information indicates, for example, a news program, a sports program, a movie, and the like. The broadcast time zone information is information indicating a broadcast time zone.

  The additional information detection circuit 16 supplies this information to the system controller 20 if such additional information is included in the header portion of the video signal, for example.

  The feature amount detection circuit 17 detects the feature amount from the video signal and the audio signal as described above. Specific feature amounts include motion amount information of a video, that is, motion vector information, appearance information of a telop inserted in the screen, music start or end information, and the like. Examples of the motion amount detection method include a representative point matching method and a block matching method, but any method may be used. In addition, as a method of detecting a telop, for example, a method of detecting pixels having a constant luminance continuously in the time axis direction, a method of detecting a region having a higher luminance level than neighboring pixels, There are a method for detecting an edge and detecting an edge pattern continuous in a predetermined area, a method for detecting contrast using the histogram by comparing the contrast with the background, and the method is particularly limited. Not.

  The feature amount detection circuit 17 detects such feature amount information from the video signal and the audio signal, and supplies this information to the system controller 20.

  On the other hand, the system controller 20 performs the processing shown in the flowchart of FIG. 2 based on the additional information and the feature amount described above, and generates an identification signal.

  When the operation of the video signal recording apparatus 1 is started, for example, when the power is turned on, the system controller 20 starts processing from step S11.

  In step S <b> 11, the system controller 20 initializes controlled circuits such as the additional information detection circuit 16 and the feature amount detection circuit 17. Subsequently, in step S12, it is determined whether or not there has been a recording start input operation by the user, that is, a recording instruction from the user. If there is no operation input from the user, the process waits in step S12, and if there is an operation input from the user, the process proceeds to step S13. In step S13, the system controller 20 provides a recording start control signal to each circuit. When the recording operation of each circuit is started, the system controller 20 reads the additional information and the feature amount from the additional information detection circuit 16 and the feature amount detection circuit 17.

  Subsequently, in step S14, the system controller 20 generates an identification signal based on the read additional information and feature amount. Specific contents of the identification signal are as follows.

  That is, a telop identification signal indicating that a telop appears in the frame, a music start identification signal indicating that music starts from the frame, a music end identification signal indicating that music ends in the frame, and the frame A person identification signal indicating that a certain person appears, a program identification signal indicating that a video of a certain program is recorded in the frame, a genre identification signal indicating a genre in the program of the frame, It is a broadcast time identification signal or the like representing a broadcast time.

  It should be noted that the various identification signals mentioned here are merely examples, and their contents are not limited as long as they are identification signals that can be generated based on additional information and feature amounts.

  Subsequently, in step S <b> 15, the system controller 20 supplies the generated identification signal to the recording processing circuit 14.

  When the identification signal is supplied, the recording processing circuit 14 records the video signal and the audio signal supplied from the video signal compression circuit 7 and the audio signal compression circuit 13 on the recording medium 15. An identification signal corresponding to the frame is added. Specifically, this identification signal is a file management information area called a so-called FAT (File Allocation Table), TOC (Table Of Contents), subcode, etc. of a video signal, an area called a navigation pack in the DVD-VIDEO format, or the like. To be recorded. Note that these file management information and the like may be generated by the system controller 20 generating an actual data stream and synthesized by the recording processing circuit 14 with the video signal.

  The recording processing circuit 14 may record the identification signal in another area of the recording medium 15 together with the synchronization information of the video signal without recording the identification signal in such a file management area.

  Subsequently, in step S16, the system controller 20 determines whether the recording is finished. If the recording has not ended, the process proceeds to step S17.

  In step S17, the system controller 20 next updates the frame for detecting the additional information and the feature amount, and repeats the processing from step S13. Here, additional information is generated for each frame, and the process is updated for each frame. However, for example, additional information may be generated for a fixed time unit instead of a frame unit, and the process may be updated. good. At this time, time management information for synchronizing the identification signal and the video signal is required.

  When the system controller 20 determines that the recording is completed in step S16, the process from step S11 to step S17 is terminated.

  As described above, the video signal recording apparatus 1 generates a plurality of identification signals corresponding to each screen based on the additional information and the feature amount of the video signal, and generates an identification signal for generating such a search screen. By recording on the recording medium together with the video signal, the outline of the recorded video signal can be easily grasped, and the video signal can be searched efficiently and a search screen can be generated. .

  Next, a video signal reproducing apparatus according to an embodiment to which the present invention is applied will be described with reference to the drawings.

  The video signal reproducing apparatus of this embodiment is an apparatus that reproduces a video signal from a recording medium and generates a search screen for searching for the video signal based on an identification signal recorded on the recording medium.

  FIG. 3 is a block diagram of the video signal reproducing device 30 according to the embodiment of the present invention. The video signal reproduction device 30 is expanded by a reproduction processing circuit 31 that reproduces the video signal and the audio signal from the recording medium 15, and a video signal expansion circuit 32 that expands the video signal reproduced from the reproduction processing circuit 31. The video signal processing circuit 33 that performs predetermined processing on the video signal based on the control of the system controller 41, which will be described later, a memory 33a that is a processing field of the video signal processing circuit 33, and the video signal processing circuit 33 A video signal digital-analog conversion circuit (hereinafter simply referred to as a video signal D / A conversion circuit) 34 for converting the processed digital video signal into an analog video signal, and a video for output processing of the analog video signal And a signal output processing circuit 35.

  Further, the video signal reproduction device 30 is predetermined based on control of an audio signal expansion processing circuit 36 that performs expansion processing of the audio signal reproduced from the reproduction processing circuit 31 and a system controller 41 described later with respect to the expanded audio signal. And an audio signal digital / analog conversion circuit (hereinafter simply referred to as audio signal D /) for converting the digital audio signal processed by the audio signal processing circuit 37 into an analog audio signal. 38) and an audio signal output processing circuit 39 for outputting an analog audio signal.

  Further, the video signal reproduction device 30 includes an identification signal detection circuit 40 that detects an identification signal from the reproduction signal reproduced from the reproduction processing circuit 31.

  The video signal reproduction device 30 controls the video signal processing circuit 33 based on the detected identification signal, and stores a system controller 41 that controls each other circuit and data referred to by the system controller 41. A database 42 and an operation input processing circuit 43 that supplies operation input information to the system controller 41 are provided.

  The recording medium 15 may be any recording medium such as a hard disk, a magnetic disk, a magneto-optical disk, and a memory card. On this recording medium 15, the video signal recorded by the video signal recording apparatus 1 described above and its identification signal are recorded.

  For example, if the recording medium 15 is an optical disk, the recording processing circuit 31 reproduces data from a pickup or the like, demodulates this data by a predetermined method, and performs error correction processing or the like. Then, the recording processing circuit 31 supplies the video signal and the audio signal recorded on the recording medium 15 to the video signal expansion circuit 32 and the audio signal expansion circuit 36. Further, the recording processing circuit 31 reproduces the TOC information and the like recorded together with the video signal and supplies the reproduced TOC information and the like to the identification signal detection circuit 40.

  The compressed video signal from the recording processing circuit 31 is input to the video signal expansion circuit 32. The video signal decompression circuit 32 decompresses the compressed video signal using, for example, the MPEG2 system and supplies the decompressed video signal to the video signal processing circuit 33.

  The video signal processing circuit 33 receives the expanded video signal from the video signal expansion circuit 32. The video signal processing circuit 33 performs processing of the video signal using the memory 33a based on the control of the system controller 41, and generates a search screen. Details of this processing will be described later. The video signal processing circuit 33 supplies the video signal subjected to predetermined processing to the video signal D / A conversion circuit 34.

  The digital video signal from the video signal processing circuit 33 is input to the video signal D / A conversion circuit 34. The video signal D / A conversion circuit 34 converts the digital data into an analog signal and supplies it to the video signal output processing circuit 35.

  The video signal output processing circuit 35 is supplied with an analog video signal from the video signal D / A conversion circuit 34. The video signal output processing circuit 35 amplifies this analog video signal and outputs it to a monitor device as an external device, for example.

  The audio signal expansion circuit 36 receives the compressed audio signal from the recording processing circuit 31. The audio signal decompression circuit 36 decompresses the compressed audio signal using, for example, the MPEG2 system and supplies the decompressed audio signal to the audio signal processing circuit 37.

  The audio signal processing circuit 37 receives the expanded audio signal from the audio signal expansion circuit 36. The audio signal processing circuit 37 performs predetermined processing on the audio signal based on the control of the system controller 41. The audio signal processing circuit 37 supplies the audio signal that has undergone predetermined processing to the audio signal D / A conversion circuit 38.

  The digital audio signal from the audio signal processing circuit 37 is input to the audio signal D / A conversion circuit 38. The audio signal D / A conversion circuit 38 converts the digital data into an analog signal and supplies it to the audio signal output processing circuit 39.

  The audio signal output processing circuit 39 is supplied with an analog audio signal from the audio signal D / A conversion circuit 34. The audio signal output processing circuit 35 amplifies the analog audio signal and outputs it to, for example, a speaker serving as an external device.

  The identification signal detection circuit 40 receives, for example, TOC information, subcode information, or the like, which is management information such as a video signal reproduced from the recording processing circuit 31. The identification signal detection circuit 40 detects the identification signal recorded by the video signal recording apparatus 1 described above from this management information. The identification signal detection circuit 40 supplies this identification signal to the system controller 41 in association with the frame number processed by the video signal processing circuit 33 and the time information of the frame.

  Here, the identification signal detected by the identification signal detection circuit 40 includes, for example, a telop identification signal indicating that a telop appears in the frame, a music start identification signal indicating that music starts from the frame, A music end identification signal indicating that music ends in a frame, a person identification signal indicating that a person in the frame appears, and a program identification signal indicating that a video of a program is recorded in the frame A genre identification signal representing the genre of the program in the frame, a broadcast time identification signal representing the broadcast time of the frame, and the like.

  The identification signal from the identification signal detection circuit 40 is input to the system controller 41. The system controller 41 controls the video signal processing circuit 33 based on the input identification signal, and causes the video signal processing circuit 33 to generate a search screen described in detail later. Details of the processing of the system controller 41 will be described later.

  In addition, the system controller 41 controls the audio signal processing circuit 37 in accordance with the control of the video signal processing circuit 33 to control the audio signal to be reproduced.

  The system controller 41 is supplied with control information and the like from the database 42. The system controller 41 performs various controls based on this control information.

  Further, the operation input information from the operation input processing circuit 43 is supplied to the system controller 41. The system controller 41 performs various controls based on this operation input information.

  Next, processing contents of the system controller 41 and a search screen generated by the video signal processing circuit 33 will be described.

  FIG. 4 is a diagram for explaining a search screen generated by the video signal reproduction device 30. Here, the search screen is a screen in which a plurality of characteristic screens are displayed on the monitor in order to grasp the contents of the video signal recorded on the recording medium 15.

  The video signal processing circuit 33 generates this search screen based on the control of the system controller 41. That is, the system controller 41 determines a frame to be displayed on the search screen based on the identification signal. Then, the system controller 41 causes the video signal processing circuit 33 to read this frame from the recording medium 15. Based on the control of the system controller 41, the video signal processing circuit 33 synthesizes each frame in the memory 33a when a frame to be displayed on the search screen is supplied. As shown in FIG. Reduce and output in 1 frame.

  The system controller 41 selects a frame to be displayed on the search screen based on a user operation input or information on the database 42. That is, since there are a plurality of identification signals recorded on the recording medium 15, the system controller 41 determines which identification signal is to be displayed based on a user operation input or the like.

  Hereinafter, the processing of the system controller 41 when generating the search screen will be described with reference to the flowchart shown in FIG.

  The system controller 41 starts processing from step S21 at which the video signal reproduction apparatus 30 is powered on and the operation starts.

  In step S21, the system controller 41 initializes controlled circuits such as the video signal processing circuit 33 and the identification signal detection circuit 40. Subsequently, in step S22, it is determined whether or not there is an operation input from the user. If there is no operation input from the user, the process waits in step S22, and if there is an operation from the user, the process proceeds to step S23.

  In step S23, the system controller 41 determines whether the operation input from the user is a search screen generation operation. If the search screen is to be generated, the process proceeds to step S25. If the search screen is not to be generated, for example, if the video signal playback operation or high-speed playback is simply performed, the process proceeds to step S24.

  In step S24, the system controller 41 performs control such as reproduction processing and ends this processing.

  In step S25, the system controller 41 performs an identification signal selection process to detect a frame to be output as a search screen based on a user operation input or the like. That is, in order to display a frame designated by the user, an identification signal corresponding to the frame is selected.

  In this step S25, the system controller 41 performs the processing from step S41 to step S51 specifically shown in the flowchart of FIG.

  First, in step S41 to step S43, the system controller 41 determines an identification signal setting input that is operated and input by the user. Here, there are three cases, for example, a database setting input, a personal ID setting input, and a normal setting input as the identification signal setting input from the user.

  The database setting input is a case where several patterns of combinations of identification signals are registered in advance on the database 42, and a search screen is generated with the registered combinations of identification signals. Specifically, if the setting of the combination of the news program identification signal and the telop identification signal and the setting of the music start identification signal are registered, the setting designated by any user is read from the database 42.

  The personal ID setting input is performed when the user registers in advance a combination of identification signals on the database 42 or the recording medium 15. In this case, the user registers a combination of personal identification signals and inputs his / her registration code to read out this setting when generating a search screen. Specifically, if a user has registered in advance a combination of an identification signal for a sports program and an identification signal for an A player, this setting is read from the database 42 or the recording medium 15 when the user's own registration code is input.

  The normal setting input is an input in which the user selects an arbitrary identification signal from among a plurality of identification signals and sets AND conditions, OR conditions, etc. of the selected identification signal. This is the case when setting at the time.

  In step S41, the system controller 41 proceeds to step S47 when these three operation inputs are not present. If there is a database setting input, the system controller 41 proceeds from step S42 to step S44. In step S44, the system controller 41 reads the setting from the database 42 and ends the process. If there is a personal ID setting input, the system controller 41 proceeds from step S43 to step S45, and in this step S45, the personal setting information is read from the database 42 or the recording medium 15 and the process is terminated. If there is a normal input, the system controller 41 proceeds from step S43 to step S46. In step S46, the system controller 41 sets an identification signal according to the user's operation input and ends the process.

  In step S47, the system controller 41 determines whether or not the video signal reproduction device 30 is in the initial state. That is, the system controller 41 is in this initial state when the video signal reproduction device 30 is started for the first time or when this device is reset. If it is in the initial state, the process proceeds to step S48, where initialization setting information is read from the database 42 and the like, and the process is terminated.

  If it is not in the initial state, in step S49, the setting of the identification signal when the search screen is first generated is read, and it is determined whether or not a certain period of time has passed. For example, it is determined whether one month has passed since the search screen was first generated. If it is determined that the predetermined time has not elapsed, the process proceeds to step S50. If it is determined that the predetermined time has elapsed, the process proceeds to step S51.

  In step S50, the system controller 41 reads the previous setting from the database 42 and ends the process. In step S51, the system controller 41 sets an identification signal that is not set in the previous setting, and ends the process.

  The system controller 41 performs the processing from step S41 to step S51 as described above, sets or reads the identification signal to be detected, and proceeds to the next step S26 shown in FIG.

  In step S26, the system controller 41 determines whether to newly generate a search screen. When a new search screen is not generated, the process proceeds to step S27, and in this step S27, the old search screen stored in the memory 33a is displayed. When a new search screen is generated, the process proceeds to step S28.

  In step S <b> 28, the system controller 41 acquires the identification signal set in step S <b> 25 from the recording medium 15 via the identification signal detection circuit 40. In subsequent step S29, the system controller 41 stores the frame to be displayed on the search screen on the memory 33a based on the acquired identification signal. At this time, the video signal processing circuit 33 reduces the number of frames stored on the memory 33a by a certain amount so that a plurality of frames can be displayed on a one-frame search screen. Then, in step S30, it is determined whether or not the search screen generation process is completed. When the search screen generation process is completed, the process proceeds to step S31.

  In step S31, a new search screen stored on the memory 33a is output and displayed on the monitor, and the process ends.

  As described above, the video signal reproduction device 30 generates such a search screen according to a plurality of identification signals corresponding to each screen based on the additional information and the feature amount of the video signal, thereby generating the video signal. The outline of the content of the video signal can be easily grasped, and the video signal can be searched efficiently.

  Specifically, when the search screen is generated under the conditions of the news identification signal and the telop identification signal, the video signal reproduction device 30 can display it on the monitor as shown in FIG.

  It should be noted that the video signal reproduction apparatus 30 has a very large number of frames corresponding to the set identification signal, and, for example, when it cannot be displayed on one search screen, a thinning-out process of displaying only the first frame of consecutive frames on the search screen. I do. Specifically, when the search screen is generated under the conditions of the sports identification signal and the A player identification signal, it is displayed on the monitor as shown in FIG.

  Next, an optical disk as an embodiment to which the present invention is applied will be described with reference to the drawings. This optical disc is a recording medium on which a video signal and an identification signal are recorded by the video signal recording apparatus 1 described above.

  As shown in FIG. 9, the optical disk 50 is divided into a program area and a TOC area. In the program area and the TOC area, data is written and read in units of sectors having a recording capacity of 2532 bytes, for example.

  As shown in FIG. 10 (a), the data structure of each sector in the program area includes a synchronization pattern in which synchronization data is recorded, a subcode, and subcode error correction in which error correction data of this subcode is recorded. It includes a code, user data in which video data and audio data are recorded, and an error correction code for user data in which error correction data of the user data is recorded.

  The data structure of this subcode includes a Sector Number (for example, 4 bytes) indicating a sector number, a TIME CODE (for example, 4 bytes) indicating an absolute time, an ID CODE, and the like.

  In the ID CODE, information of each identification signal is shown, and an ID number indicating the number of recorded identification signals and identification signals such as a telop identification signal, a music start identification signal, and a music end identification signal are indicated. ID No. n and the like are recorded.

  Each ID NO. For example, an address and a time code are recorded in n. The video signal reproducing device 30 is connected to the ID NO. A target frame can be displayed by searching for an address of n and generating data of the address.

  Further, as shown in FIG. 10B, the data structure of each sector in the TOC area includes a synchronization pattern in which synchronization data is recorded, user data in which management information is recorded, and error correction data of this user data. It consists of recorded error correction codes.

  The data structure of the user data includes a Sector Number (for example, 4 bytes) indicating a sector number, personal ID data, and the like. The personal ID data is identification signal data in which a combination is set by the user as described above. Specifically, this personal ID includes the ID number of each identification signal indicated in the subcode of the program area. Further, personal IDs are indicated in this user data by the number of registered users.

  For the optical disc 50 having such a data structure, the recording device of the optical disc 50 records an identification signal in the subcode of the program area together with the video signal. Further, the playback device of the optical disc 50 plays back the subcode in the program area together with the video signal. Further, the playback device of the optical disc 50 plays back the personal ID described above from user data in the TOC area, and plays back an identification signal corresponding to the personal ID.

  As described above, the optical disc 50 can record a plurality of identification signals corresponding to the respective screens based on the additional information and the feature amount of the video signal, and further reproduces the content of the video signal by reproducing the optical disc. Can be easily grasped, and a video signal can be efficiently searched.

  Although an example of the format of the optical disc has been described as an embodiment of the present invention, the present invention is not limited to this optical disc, and can be realized in other formats.

  Further, as the embodiment of the present invention, the video signal recording device 1, the video signal reproduction device 30 and the recording medium 50 have been described. However, as shown in FIG. 11, the video signal recording device 1 and the video signal reproduction device 30 are described. A video signal recording / reproducing apparatus 70 to which the present invention is applied can be realized by including the host controller 60, the database 61, and the operation input processing unit 62 that can control both of them.

It is a block block diagram of the video signal recording device of the embodiment to which the present invention is applied. It is a flowchart which shows the processing content of the system controller of the said video signal recording device. It is a block block diagram of the video signal reproducing | regenerating apparatus of embodiment which applied this invention. It is a figure explaining the search screen reproduced | regenerated by the said video signal reproduction | regeneration apparatus. It is a flowchart which shows the processing content of the system controller of the said video signal reproduction | regeneration apparatus. It is a flowchart which shows the processing content of the system controller of the said video signal reproduction | regeneration apparatus. It is a figure explaining the search screen reproduced | regenerated by the said video signal reproduction | regeneration apparatus. It is a figure explaining the search screen reproduced | regenerated by the said video signal reproduction | regeneration apparatus. It is a figure explaining the recording area of the optical disc of the embodiment to which the present invention is applied. It is a figure explaining the data structure of the said optical disk. It is a block block diagram of the video signal recording / reproducing apparatus of embodiment which applied this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Video signal recording device, 14 Recording processing circuit, 15 Recording medium, 16, Additional information detection circuit, 17 Feature-value detection circuit, 20, 41 System controller, 21, 42 Database, 22, 43 Operation input processing circuit, 30 Video signal Playback device, 33 video signal processing circuit, 50 optical disk, 70 video signal recording / playback device

Claims (4)

Additional information detecting means for detecting additional information of the video signal;
Feature quantity detection means for detecting the feature quantity of the video signal;
Identification signal generating means for generating an identification signal corresponding to each screen of the video signal based on the additional information and the feature amount;
Reproduction means for reproducing a video signal of a screen corresponding to the first identification signal based on the additional information generated by the identification signal generation means and corresponding to the second identification signal based on the feature amount. A video signal recording / reproducing apparatus.   Corresponding to a first identification signal based on the additional information from a recording medium on which an identification signal corresponding to each screen generated based on the additional information and feature amount of the video signal is recorded together with the video signal, and A video signal reproduction method characterized by reproducing a video signal of a screen corresponding to the second identification signal based on the feature amount. Additional information detecting means for detecting additional information of the video signal;
Feature quantity detection means for detecting the feature quantity of the video signal;
Identification signal generating means for generating an identification signal corresponding to each screen of the video signal based on the additional information and the feature amount;
A database in which a plurality of combination patterns of the identification signals are registered;
Playback means for playing back the video signal of the screen corresponding to the identification signal,
A video signal recording / reproducing apparatus, wherein a screen corresponding to the combination pattern of the identification signals is displayed as a search screen. Additional information detecting means for detecting additional information of the video signal;
Feature quantity detection means for detecting the feature quantity of the video signal;
Identification signal generating means for generating an identification signal corresponding to each screen of the video signal based on the additional information and the feature amount;
A recording medium on which the identification signal is recorded together with the video signal;
Playback means for playing back the video signal of the screen corresponding to the identification signal,
A plurality of combination patterns of the identification signals are registered in the recording medium,
A video signal recording / reproducing apparatus, wherein a screen corresponding to the combination pattern of the identification signals is displayed as a search screen.

Images